package utils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Utils {
	public final static String makeMd5(String ss) {
		String s = ss == null ? "" : ss;
		char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
		byte[] strTemp = s.getBytes();
		try {
			MessageDigest mdTemp = MessageDigest.getInstance("MD5");
			mdTemp.update(strTemp);
			byte[] digest = mdTemp.digest();
			int j = digest.length;
			char str[] = new char[j * 2];
			int k = 0;
			for (int i = 0; i < j; i++) {
				byte byte0 = digest[i];
				str[k++] = hexDigits[byte0 >>> 4 & 0xf];
				str[k++] = hexDigits[byte0 & 0xf];
			}
			return new String(str);
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
		return null;
	}
}
